Tractor for vehicles.



S. F. DGUGLASS.

TRACTOR FOR VEHICLES.

APPLIUATLON FILED JUNB15. 1912,

Patented Mar. 10, 1914.

3 SHEETS-SHEET 1.

S. E. DOUGLASS.

TRACTOR FOR VEHICLES.,

.APPLICATION FILED JUNE15,1912,

Patented Mar. 10, 1914 W/TNESSES /NffEA/o/c (HMUEL. F. OQGLASS S. F. 'DOUGLASS TRCTOR FOR VEHICLES. APPLICATION FILED mmm. 1912.

l ,089,696 Patented Mar. 10, 1914.

3 SHEETS-SHEET 3.

ffy/f ing tractor is used.

TEU STATES PATENT OFFICE.

SAMUEL F. DOUGLASS, OF PRAIRIE DU ROCHER, ILLINOIS.

TRACTOR FOR VEHICLES.

Application filed June 15,

T 0 all whom 'it may concern Be it known that I, SAMUEL F. Dou'onixss, a citizen ot the United States, residing at Prairie du Rocher, iu the county of Itandolph and State ot' Illinois, have invented certain new and useful Improvements in Tractors for Vehicles, ot' which the following is a specification, reference being had therein tothe accompanying d 'awing This invention relates to vehicles and has special reference to a novel arrangement of tractor means for wheels ot a vehicle.

One ot' the objects ol. the invention is to improve the general construction of devices of this character aro render it possible to use or not use tractor blades carried by a wheel.

Another object o1 the invention is `to provide improved means whereby tractor blades may be projected successively beyond the rim of a wheel While the same rotates.

lVith the above and other objects in view, the invention consists in general ol certain novel constructions, combinations and arrangements oil parts as will be hereinafter iully'described, illustrated in the accompanying drawings, and speeilically claimed.

In the acctuniianying drawings, like characters ot reference indicate like parts in the several views, and Figure l is a side elevation of a wagon equipped with wheels having the improved tractor blade, the elevation being diagrammat'ically shown. Fig. 2 is a detail view showing the manner of projecting a tractor blade or spur when used in connection with the pneumatically tired wheel. Fig. 3 a section on the line 3-3, Fig. Q. Fig. 4 is a side elevation showing the arrangen'ient used when a Slid- F 5 a section on the line 5-5, Fig. 4t. Fig. t) is a view partly diagrammatic showing the positions of cer tain levers used to control the mechanism of Figs. et and 5. Fig. 7 is an enlarged vertical section through a wheel having a solid rim. Fig. S is a section on the line S-8, Fig, 7.

In the form oit the invention illcstrated in Figs. 2 and 3 the axle 10 oit" the vehicle .is secured thereto by a bracket 11 and pivoted on this bracket is a cam member consisting of a laterally curved U-shaped portion l2 having its arms united by a cross bar 13 and being provided with a single arm 14. extending from the cross bar 13 and pivoted to the bracket 11. 0n the single arm 14 Speciiication of Letters Patent.

Patented Mar. 10, 1914.

1912. Serial No. 703,873.

is a lug 15 whereto is pivotally connected a link 1G, the upper end of which is connected to one arm of a bell crank lever 1T pivoted between its ends to the bracket 11. The other arm of this bell crank lever is connected by means oi the rod 1S with a latch lever 19 suitably pivoted on the vehicle and on the vehicle is also provided a suitable quadrant Q0 for engagement with the latch lever.

At 2l is indicated the wheel ot the vehicle the sume being shown as of the pneumatic tired variety. Secured to this wheel an annular casini- 22 wherethrough extends a series of tractor blade arms Q3, each of which is provided with a yoke Q4 which straddles the wheel rim and which is held in position relative thereto by means of guides 2o. Each of the yokes is provided with suitable ends or points Q6 to constitute tractor means so that when projected heyond the rim of the wheel these points engage in the ground and prevent slipping of the wheel either by rotation or moving sidewise. Within the casing QQ cach arm Q3 is provided with a collar QT and between this collar and the outer face oi the casing is a coil spring QS which surrounds the arm 23 and normally presses thc same inwardly from the rim of the wheel. Furthermore each arm 23 projects through the annular easing and has on its extremity a head 29.

In the modified form shown in F 7 and 8 a wheelIiO having a solid rim 31 is provided. In this rim is a series of openings 32 and on each spoke 's a guide,33 through which the tractor blade arm Q3 passes. In this form each arm is provided with a single blade 84 which is arranged to project when desired through its respective.

opening. In the operation of this part ot the device it will be noted, upon observation of Figsf?. and 7 that when it is desired to project the tractor blade or point beyond the rim the lever 19 is so moved as to depress the bight or curved portion ot the U- shaped cam member l2 so that as the respective head 29 passes around the same it will be engaged by this curved portion and forced outward, the respective spring 2S being compressed to permit ot such movement.

In order to remove the necessity of opcrating the device by hand the mechanism illustrated in Figs. It to G may be employed. The wheelYused in combination with this frame is provided with the casing Q2 wherethrough extend the slidable tractor arms 23. lWithin the casing 22 each arm 23 is provided with a. collar 27 and between this collar and the outer face of the casing. is a coil spring 28 which surrounds the arml23 normally pressing the same inwardly from the rim of the wheeh Furthermore each arm 23 projects through the angular casing and has at its outer extremity ahead 29. In

thislmechanism the cam member comprises U-shaped bar having an. arcuate cam end, 5

and provided with reversely curved legs 36 which pass through guides 37 formed on a bracket 38 carried on the axle 10. This (axle also supports a bracket 39 which is prothe cam :membei` arms The upper ends of the arms 36 are connected by the yoke 4l and depending from this yoke is a pair of arms 42 each of which is provided at its lower'end with teeth 48 adapted to be engaged by a lug 44 Jformed on a collar 45 fixed to the sliaftlO. Each of the arms 42L is provided with an, ear 46 wherethrough passes the arm 47 of an operating lever pivotally supported on the bracket 39 and provided with the operating handle 48. Centrally disposed and depending from the yoke 41 is ya short arni 49 provided with teeth 50 and this arm is arranged to engage beneath the bent' portion A5l ot' the bracket- 38 as the device is depressed. The position of the arm 49 is regulated by means cita similar in all respects to the le lever 52 vers 47. v

Now when the vehicle is in motion the lug 44 will be constantl of the arms 42 be move toward it by properly actuating thehandle 48 this lug will engage the teeth 4 3 and draw down the cam bar. One of the teeth 50 will engage beneath the part 51 when the bar is down and hold the cani bar from rising. lf it is again desired to lift the cam bar it is simply necessary to release the same whenthe action of thesprings will push the bar up to raised position, while the bearing of the heads 29 upon the cam will normally hold the same 'in a raised position. lt will be noted that whether the vehicle is going ahead or backward the forcing down action may be accomplished, this being due to the provision vided with guides 4G for the upper end ot rotated and it oneA invention, what ipsaeee and cause successive engagement of the heads therewith, said means comprising a frame carried by said axle, and supporting said movable cam, toothed bars carriedby said frame, and a lugcarried by said collar .and projecting therefrom, and adapted to engage said toothed bars.

2. Ina device of the kind described, a

axle, a wheel carried by said axle, a collar l carried by said axle adjacent said wheel, a series of tractor blades slidably mounted upon said wheel, a movable-cam supported v adjacent the Wheel, said tractor blades having heads adapted toengage said cam, means to move said cam and cause successive engagement of the heads therewith, said means comprising a frame carried by said axle, and supporting said movable cam, toothed bars carried by said trame, a lug carried b said collar and projecting therefrom and a apted to engage said toothed bars, means to move said toothed bars into engagement with said lug, and a locking means to hold said cam in.

engagement with said tractor blades;

3.111 a device of the kind described, an axle, a wheel carried by said axle, a collar carried by said axle, a series of tractor blades slidably mounted upon saidA wheel, a movable cam support/ed adjacent the Wheel, saidti'actor blades having heads adapted to engage said cam, means to move said lcam land vcause successive engagement of the heads therewith, said means comprising a frame carried by said axle, and supporting said movable cam, toothed bars carried by said trame, a lu carried by said collar and iol projecting there rom and adapted to engage said toothed bars, arms carried by said frame adjacent said toothed bars,.each -arm provided with a bent portionl terminating in a crank portion, said crank adapted to'be moved whereby said arm will bear upon said toothed bar and move the same in engagement with said lug, and locking means to hold saidl cam in engagement with said tractor blades.

4. ln a device of the kind described, an axle, a. wheel carried by said axle, a collar carried by said axle, a series of tractor blades slidably mounted upon said wheel, a

movable 'cam supported adjacent the wheel, y said tractor blades having heads adapted to engage said cam, means to move said cam and cause successive engagement of the heads therewith, said means comprising a frame carried by said axle supporting said movable cam, toothed bars carried by said frame,-

a lug carried by said collar and project-ing therefrom and adapted to .engage said toothed bars, means to move'said toothed i bars into engagement with said lug, a bracket carried by said axle adjacent said cam, said bracket provided with a'bent portion,

`a short arm provided with teeth connected tousaid cam and positioned above said axle adjacent said bracket, said teeth of said sh0rtarm adapted to engage Said bem p0r- Lon of Said brzu'kt for holding Suid cum in engagement Wlh Hu: heads of mid `tractor blades, :md n level' carried by Suid 'frame for releasing said short :um from engngenwnt with said bracket.

In testimony whereof I hereunto MHK-my slgnature 1n presence of two wltnessc.

SAMUEL F. DOUG-LASQ.

Wit messes z GEO. A. REIFEL, Crus. J. Knmns.' 

